Stress-breaking dental attachment



A. FEINBERG STRESS BREAKING DENTAL ATTACHMEN Jan. 22, 1924.

Filed May is. 1923 INVENTOR Patented Jan. 22, 1924. v

M ran- STATES ARTHUR FEINBERG,

ornnw YORK, n. Y.

STRESS-BREAKING DENTAL ATTACHMENT,

.Application filed May 18,

teeth in such a manner as to preclude the transmission to the naturalteeth, stresses and strains which would be apt to in time effect andcause looseningof the natural teeth. 7

It is known in the practice of dentistry that when bridgework orplate-work is anchored to natural teeth or roots in a firm or rigidmanner, stresses and strains are communicated to the natural teeth fromthe artificial denture in such a manner, as to cause irritation, andloosening of the natural teeth. J

The attachment ofmy invention is so arranged and Constructed as toobviate or reiove all the strains from the natural teeth, and transmitthem directly to theridge or gums of the mouth, that is, the 'forces' ofmastication which are brought to bear upon the artificial denture aretransmitted to the gumsor ridges, and the natural teeth are availablemerely for the purpose of maintaining the denture at all times, inproper and normal relation and position to the natural teeth, and alsoengages with the gums and ridges, so that it does not permit the dentureto draw away or to become dislodged. s

A further object of my invention is to overcome the difficultiesencountered -1n convergin'g, diverging and tilting angles of the naturalteeth, when such teeth are utilized as abutments for artificialdentures.

A further and particular object of my invention isto provide meanswherebyrcpairs and adjustments can easily be made without detriment tothe artificial denture.

The attachment of my invention, consisting of two members, is sodesigned, that one member can easily be released or disconnected fromthe other member, for the purpose of making such repairs andadjustments.

Adjustments are made for the purpose of allowing more play or workingspace between the two members, when such play or working space is lostthrough resorption or absorption of the alveolar process.

Various methods and appliances have been 1923. Serial No. 639,938.

made to overcome the diiiiculties mentioned, and the presentinventionrelates to improvements on these devices and obviates thedifficulties and'objections mentioned, and more so to furnish a moresimple compact and er"- ficient means for connecting a denture tonatural teeth. 7

' It will be apparent from the hereinafter detailed description andclaims, when read in conjunction. with theaccompanying draw-- 11113.

Figure 1, is perspective view of a metallic plate to be secured to aclasp or crown, and is termed the clasp part.

Figure 2, is perspective view of a metallic plate to be secured to adenture or bridge and is termed the denture part.

Figure '3, is a perspective view of the attachment assembled.

Figure 4c, is a longitudinal sectional view of the attachment when innormal position Figure 5, is a longitudinal sectional view of theattachment when one inember israised and theother inemberlowered.

Figure 6, shows its application to the natural teeth and denture.

In the drawings, 10 designates the clasp part, consisting of a metallicplate to be 'firmly' secured to a crown or clasp as at 25,

by soldering or otherwise, and is bent at its lower end to form a leg11, which is Y slotted as at 12, Figure 1. The denture part 13, as inFigure 2, consisting of a metallic plate, preferably of gold, embodies a100 M-which has its free ends bent and turns upwardly and in the sameline, forming two integral vertical tongues, 15 and 16 as in Figure 2.The free end ot tongue 16 resting.

against and abutting with the base of the upper tongue 15, and bothtongues being parallel to the clasp part as in Figure .3. The lowertongue 16, engages with the slot 12 of the clasp part 10 for slidingmovements, whereas the upper tongue 15 serving as a protection, orsafeguard between th plate 26 and clasp part 10, as in Figure 6, therebypermitting free and unobstructed movements of the parts mentioned.Tongue 15, not only being parallel to, but corresponding in size as tothe width and height of the clasp part 10 as inFigure 8. The loop, 14which is formed between the bases of the tongues 15 and 16 is providedfor the receps tion of and engagement with the leg 11.

To assemble the clasp part 10 with the denture part 13, the free end ofthe tongue 16 is slightly opened, and pamd through the aperture 12 ofthe clasp part 10 as in Figures 3 and 4. This will bring the parts 10and 13 in normal position and relation to each other, and allowing freemovements be.- tween them. The free end of tongue 16 is then broughtback to its original position thereby preventing their separation.

The clasp part 10 with its leg extending outwardly is soldered orotherwise connected to the side of the crown or clasp as at Figure 6. Insecuring the denture part 13 to the denture 26, the denture is broughtto bear upon the loop 14 and against the side of the tongue 15. as inFigure 6, it is then soldered or vulcanized as the case may be.

A salient feature resides in the factthat whereas the artificial dentureis resting against the side of the tongue 15, tongue 16 is entirely freeand unobstructed by the denture, thus permitting adj ustments andrepairs to be made by opening laterally the free end of the tongue 16,making the necessary adjustments, and then closing it again, when suchrepairs and adjustments are completed. As the denture part cannot break,the only member being susceptible to fracture is the clasp part, andthat has been provided for by my invention, and as explained above.

Having fully described my invention, what I desire to claim is:

1. A dental attachment embodying a slotted clasp part, a denture partcomprising a loop, the free ends of which are bent into alinement andform two vertical tongues, one of which is adapted to pass through theslot of the clasp part and the other of which is adapted to rest againstan artificial denture, whereby slight movement between said artificialdenture and clasp part ispermitted without binding.

2. A dental attachment embodying a denture part comprising two alinedtongues, a loop uniting the bases of the tongues and normallymaintaining said tongues in alined relation, and a clasp part extendinginto the loop and provided with an opening through which one of thetongues extend.

3. A dental attachment embodying a slotted clasp part, a denture partcomprising a loop, the free ends of which are bent upwardly intosubstantial alinement to form two vertical tongues, the free end of onetongue passing through the slot of the clasp for the latter, and theother tongue passing through the slot in the projection of the clasppart and abutting the base of the other tongue.

5. A dental attachment embodying a slotted clasp part, a denture partcomprising a loop,

the free ends of which are bent into alines ment to form two integralvertical tongues, the upper tongue being adapted for engagement with adental plate and the lower tongue passing through the slot of the clasppart to normally maintain the parts in assembled relation, said lowertongue being adapted to be bent laterally and out of alinement with theupper tongue to permit the release of the clasp part for the purpose ofrepairs and adjustment and to allow return of said clasp part intocooperative position when such repairs and adjustments are completed,without disturbing the relationship between the denture part and anassociated denture.

6. A dental attachment embodying a denture part comprising asubstantially C- shaped body, at the upper end of which is formed anupwardly extending tongue, one face of which constitutes a bearingsurface for a. cooperating clasp part, and the lower end'of which bodyis provided with an upstanding tongue positioned in substantialalinement with the upper tongue and terminating at, and bearing againstthe base of the upper tongue, in combination with a cooperating clasppart comprising a plate adapted to bear against the contiguous face ofthe upper tongue and provided with a projecting portion extending intothe C- shaped body of the'denture part and having an opening throughwhich the lower tongue extends.

ARTHUR FEINBERG.

